Contemporary Control Systems BASRTP-B Panduan Instalasi - Halaman 13

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Device Parameter

Device Instance (Default Value = 0)

The router's device instance is a 22-bit value (0–4,194,302). Do

not use 4,194,303 which is reserved by BACnet. Each BACnet

device within the same BACnet internetwork must have a unique

device instance. One must be assigned to the BASRTP-B.

BACnet Ethernet

Ethernet Network (Default Value = 0 — disables BACnet Ethernet)

Most BACnet communication that is carried by Ethernet uses the

BACnet/IP protocol. However, there are still instances in which

the older BACnet Ethernet protocol (ISO 8802-3) is found. The

BASRTP-B allows these two protocols to communicate.

BACnet Ethernet uses Ethernet MAC addresses for station

addressing — unlike BACnet/IP which addresses messages by

means of Internet Protocol (IP) addresses. Each Ethernet MAC

address (often called the physical address) is unique to the

Ethernet network adapter. It is permanently embedded into the

adapter during manufacture and cannot be changed.

It is

composed of six two-digit hexadecimal numbers (00–FF). An

example of an Ethernet MAC address is:

00-08-A1-10-BD-EB

Each Ethernet network adapter has the ability to store an IP

address that is changeable.

This IP address is typically

represented as four decimal values (each is 0–255) separated by

dots. Often called the dotted quad format, an example is:

192.168.92.1

NOTE: Although they may share the same Ethernet physical

network, BACnet Ethernet devices and BACnet/IP devices must

have their own unique network number and these two networks

cannot communicate unless their messages pass through a router.

These network numbers must be in the range of 1–65534 (0 and

65535 are reserved). If the BACnet Ethernet network value is

left at its default value of 0, the BACnet Ethernet function within

the BASRTP-B will be disabled. To prevent message loops, a

subnet must have only one router enabled for BACnet Ethernet.

TD070210-0ID